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Note 17 - Segment Reporting (Details Textual) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015
Number of Reportable Segments |  |  | 3 |
Revenue, Net |  |  | $ 51,219,000 | $ 62,383,000
Assets of Disposal Group Including Discontinued Operation Including Not Held for Sale |  |  | 434,000 | 565,000
Tangible Asset Impairment Charges |  |  | 1,816,000 |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | 8,288,000 |
Income Tax Expense (Benefit) |  |  | (2,994,000) | 543,000
M&EC [Member] |  |  |  |
Revenue, Net |  |  | 4,419,000 | 6,591,000
Tangible Asset Impairment Charges | $ 1,816,000 | $ 1,816,000 |  |
Income Tax Expense (Benefit) |  | (3,203,000) |  |
M&EC [Member] | Permit [Member] |  |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | $ 8,288,000 | $ 8,288,000 |  |
Promissory Note Dated August 2, 2013 [Member] |  |  |  |
Debt Instrument, Unamortized Discount |  |  | 0 | 50,000
Term Loan [Member] |  |  |  |
Debt Issuance Costs, Net |  |  | 151,000 | 152,000
Credit Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | Federal Government [Member] |  |  |  |
Revenue, Net |  |  | $ 27,354,000 | $ 36,105,000
Concentration Risk, Percentage |  |  | 53.40% | 57.90%

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